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author | Florian Westphal <fw@strlen.de> | 2016-04-01 15:17:23 +0300 |
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committer | Sasha Levin <sasha.levin@oracle.com> | 2016-07-12 15:48:30 +0300 |
commit | 62e6fd2010f76a52adcf0cf016b5d7c402ec17aa (patch) | |
tree | b2e77b28c3aacfc102fb3841167a2fb821ffdf81 /include/linux | |
parent | 674c7e173d0112abb8cb666cb84a819e3ea69018 (diff) | |
download | linux-62e6fd2010f76a52adcf0cf016b5d7c402ec17aa.tar.xz |
netfilter: x_tables: add and use xt_check_entry_offsets
[ Upstream commit 7d35812c3214afa5b37a675113555259cfd67b98 ]
Currently arp/ip and ip6tables each implement a short helper to check that
the target offset is large enough to hold one xt_entry_target struct and
that t->u.target_size fits within the current rule.
Unfortunately these checks are not sufficient.
To avoid adding new tests to all of ip/ip6/arptables move the current
checks into a helper, then extend this helper in followup patches.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/netfilter/x_tables.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h index a3e215bb0241..a2d150873721 100644 --- a/include/linux/netfilter/x_tables.h +++ b/include/linux/netfilter/x_tables.h @@ -239,6 +239,10 @@ void xt_unregister_match(struct xt_match *target); int xt_register_matches(struct xt_match *match, unsigned int n); void xt_unregister_matches(struct xt_match *match, unsigned int n); +int xt_check_entry_offsets(const void *base, + unsigned int target_offset, + unsigned int next_offset); + int xt_check_match(struct xt_mtchk_param *, unsigned int size, u_int8_t proto, bool inv_proto); int xt_check_target(struct xt_tgchk_param *, unsigned int size, u_int8_t proto, |